Sulphur Dioxide 1-60 ppm Gas Detector Tube, pk/10 Back Catalog number: 103SD Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 801935 Charcoal Tube, Coconut Shell, Standard, 50/100mg, 6 x 70mm (Packg of 50) Price on request 171SC Formaldehyde 0.05-4.0 ppm Gas Detector Tube, pk/10 Price on request 800231 Tube Holder Kit, Quad Variable, 6 x 70mm Price on request